1. The Generation R Study Group; Erasmus MC; University Medical Center Rotterdam; Rotterdam The Netherlands
2. Department of Pediatrics; Division of Respiratory Medicine; Erasmus MC; University Medical Center Rotterdam; Rotterdam The Netherlands
3. Department of Epidemiology; Erasmus MC; University Medical Center Rotterdam; Rotterdam The Netherlands
4. Department of Pediatrics; Erasmus MC; University Medical Center Rotterdam; Rotterdam The Netherlands
5. Department of Pediatrics; Division of Neonatology; Erasmus MC; University Medical Center Rotterdam; Rotterdam The Netherlands